Like everything, it depends on the quality and the context.
There is a lot of merit in those who have hand-made art, it takes time, practice and talent to make good drawings and there are those who even make animations. The bad thing is that it delays the work a lot between updates, especially if the person who draws is also the one who does other things.
3D is not bad, there are very good models and you can tell when the person who made them put effort into it, but when it is not well done it looks horrible, it is also very noticeable when the person making the models really does not do it very well, does not have much intention of making something of quality or simply does not care.
A point in favor of 3D is that it is more accessible for those who do not have enough skill or time for hand drawing.
About AI... for me it is a no, for me it feels inadequate and it causes rejection, especially when it is 3D AI. I guess in the not too distant future it will look better, but if they are going to use AI, I prefer them to use it as a tool to polish their creations instead of letting AI do everything.
Although this is just my point of view as someone who has negative points in artistic capabilities.